Examine source code of Lesje weg

{
  "manifest_version": 3,
  "name": "Lesje weg",
  "version": "0.1.11",
  "description": "Maakt de afwezigheden pagina iets meer verdraagbaar.",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "addon@brambelambel.com",
      "strict_min_version": "42.0"
    }
  },
  "content_scripts": [
    {
      "css": [
        "color.css"
      ],
      "matches": [
        "https://sjibrugge.sisofoscloud.be/*"
      ]
    }
  ]
}